Concept:
Motivated teaching encourages curiosity, interaction and active participation. Students who ask questions demonstrate interest and engagement in learning.
Step 1: Understand motivated teaching.
A motivated classroom promotes
• Active participation.
• Questioning.
• Critical thinking.
• Student engagement.
Step 2: Analyse the options.
• Maintaining strict discipline -- Necessary but not the best indicator.
• Maintaining pin-drop silence -- Does not indicate active learning.
• Enabling students actively ask questions -- Best indicator of motivated teaching. \checkmark
• Facilitating students to take notes -- Passive learning activity.
Step 3: Final conclusion.
Hence, the most significant indicator of motivated teaching is
\[
\boxed{\text{Enabling students actively ask questions}.}
\]